According to this story from The Himalayan Times, there were more than 150 helicopter flights conducted to Everest Base Camp and higher during the spring 2016 climbing season. Sources at the Tenzing Hillary Airport in Lukla say that six companies operated at least 151 flights above 5000 meters (16,404 ft) in April and May without properly reporting their activities to Nepal's Civil Aviation Authority. Of those, about 30% (roughly 45 flights) were to locations above Base Camp, most notably Camp 1 and Camp 2 on Everest.
Regulations state that helicopter flights are to go no higher than BC unless they are conducting emergency rescue operations. Those types of flights are monitored closely by Aviation officials, but it seems in this case many pilots were indicating that they were flying to Base Camp, only to go higher up the mountain later on. Authorities say that by going to higher altitudes the pilots are risking their own lives and those of their passengers, warning that there could be a fatal accident if such operations continue.
Representatives of the six companies that conduct the flights insist that they only went to the higher camps to rescue climbers who requested assistance and that they weren't doing anything outside of the regulations. The fact that so many of those flights went unreported however would suggest otherwise. If all of the flights were conducted above board, there would be no need to not report them.
The cost of a flight to Everest is not cheap. Most companies charge $5000 for a trip to Base Camp, $7500 to go up to Camp 1, and as much as $10,000 to reach Camp 2. Some of the costs of those flights are covered by the insurance companies for climbers who do have to be rescued, but one has to wonder just who is paying for the other flights.
There have been some suggestions of increasing the use of helicopters on Everest to help shuttle gear up from BC to the higher camps. This could potentially reduce the number of trips that climbers – and more importantly Sherpas – would have to make through the dangerous Khumbu Icefall. This is the section of the climb just above Base Camp that is widely considered the most dangerous section of the mountain. In 2014, the collapse of an ice serac on this section of the climb killed 16 porters who were carrying gear to Camp 1.
By using helicopters to do that work instead, it would help alleviate those dangers, but there has been no official go-ahead to begin doing that on a large scale. It seems that some of these flights were being made to ease the process of moving gear, even if no one is necessarily admitting it.
Will the trend of using helicopters on Everest continue to rise in the years ahead? Almost certainly. Will it make things safer? Possibly. Only time will tell. All I know is, that is a lot of unregulated flights to dangerous altitudes, which seems like a recipe for disaster in and of itself.